In a Windows debug build search suggestion popup triggers a Qt assertion

[veloman-yunkan]

The assertion is caused by QStyledItemDelegate::paint() being called with an invalid QModelIndex:

kiwix-desktop/src/suggestionlistdelegate.cpp

Lines 9 to 19 in 63b421e

	void SuggestionListDelegate::paint(QPainter *painter,
	const QStyleOptionViewItem &option,
	const QModelIndex &index) const
	{
	/* Paint without text and icon */
	QStyleOptionViewItem opt(option);
	QStyledItemDelegate::paint(painter, opt, QModelIndex());
	paintIcon(painter, opt, index);
	paintText(painter, opt, index);
	}

Under Linux this doesn't happen because in a normal development flow the debug build of kiwix-desktop uses the same shared libraries of Qt as the release build, whereas under Windows the version of the dlls used depends on the type of the build. Probably the issue can be reproduced under Linux by linking to the debug versions of QT .so files.

[veloman-yunkan]

Note that this bug hides behind two other bugs fixed by #1252 which is not yet merged as of opening this ticket.